Biology, 27.09.2019 15:10 sophx

Antibiotic resistance occurs when an antibiotic has lost its ability to effectively control bacterial growth. in other words, the bacteria are “resistant” and continue to multiply in the presence of therapeutic levels of antibiotic. which statement best explains this natural phenomenon in terms of darwin’s theory of natural selection.

a. the antibiotics caused certain groups of bacteria to suddenly start producing enzymes that destroyed the antibiotic before it could harm the bacteria.

b. when an antibiotic is used, bacteria that have a natural variation for resistance to the antibiotic have a greater chance of survival.

c. although susceptible bacteria are killed or inhibited by an antibiotic, any offspring they produced before they died will be resistant to the antibiotic.

d. the need to adapt or die caused some bacteria to become resistant to the antibiotic. this acquired resistance was passed into the future bacteria populations making them resistant.

Answers: 1

Show answers

Another question on Biology

Biology, 21.06.2019 19:30

What is the "great pacific garbage patch"? a large area of marine debris concentrated by rotating ocean currents a large area around the pacific rim where debris collects from natural disasters such as tsunamis an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability a large trash dump located in hawaii

Answers: 1

Answer

Biology, 21.06.2019 23:00

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Answers: 3

Answer

Biology, 22.06.2019 04:30

Emmet didn’t want to weed the garden. he put off the task toward the end of the day. he even tried to get his sister to do the job. what type of goal orientation did emmet display toward weeding the garden?

Answers: 1

Answer

Biology, 22.06.2019 06:00

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Answers: 1

Answer

You know the right answer?

Antibiotic resistance occurs when an antibiotic has lost its ability to effectively control bacteria...

Questions